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參數(shù)資料
| 型號(hào)： | U4479B |
| 英文描述： | DVB-Cable IF Converter and Full Multi-Standard Video-/Sound IF Processing |
| 中文描述： | 的DVB -電纜中頻轉(zhuǎn)換器和完整的標(biāo)準(zhǔn)Video-/Sound中頻處理 |
| 文件頁(yè)數(shù)： | 6/11頁(yè) |
| 文件大?。?/td> | 257K |
| 代理商： | U4479B |
U4479B
TELEFUNKEN Semiconductors
Rev. A2, 14-Jan-98
Preliminary Information
4 (11)
Operating Range
Parameters
Symbol
Value
Unit
Supply voltage range
VS
4.5 to 5.5
V
Ambient temperature
Tamb
0 to +85
°C
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient
(when soldered to PCB)
RthJA
75
K/W
Electrical Characteristics
VS = 5 V, Tamb = +25°C
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
DC supply
Supply voltage
VS
4.5
5.0
5.5
V
Supply current
IS
80
100
mA
Video IF- and DVB IF inputs
Input sensitivity,
RMS value
vin
80
120
mV
Input impedance
See note 1
Rin
1.2
k
W
Input capacitance
See note 1
Cin
2
pF
Video IF AGC (negative/ positive modulation)
IF gain control range
Gv
60
65
dB
AGC capacitor
CAGC
2.2
mF
Black level capacitor
CBL
100
nF
DVB AGC (QAM modulation)
IF gain control range
IF2 output voltage
Pin 13 = 1.8 Vpp
Gv
60
65
dB
Tuner AGC
Available tuner
AGC current
Itun
1
2
4
mA
Allowable output voltage
Vout
0.3
13.5
V
IF slip – tuner AGC
Current Itun: 10% to 90%
GIF
8
10
dB
IF input signal for
minimum take over point
vin
4
mV
IF input signal for
maximum take over point
vin
40
mV
Variation of the take over
point by temperature
DTamb = 55°C
IF AGC: Gv = 46 dB
Dvin
2
3
dB
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